Go Team Gibbs! Gibbs is NCIS’s Special Agent in Charge, also known as “the boss.” So when you wear the NCIS Team Gibbs T-shirt, you tell the world in plain and simple English that you are Gibbs’ biggest fan and that you, too, have serious respect for the military. This attractive navy shirt is made of 100% cotton and comes in slim fit for sizes small to XXL, perfect for every Gibbs guy.